Daniel A. Greenberg (born c. 1934), one of the founders of the Sudbury Valley School, has published several books on the Sudbury model of school organization,[1] and has been described by Sudbury Valley School trustee Peter Gray as the "principal philosopher" among its founders.[2] He is a former physics professor at Columbia University, and is described by Lois Holzman as the school's "chief 'philosophical writer'".[3]

^Gray, Peter and David Chanoff (February 1986). "Democratic Schooling: What Happens to Young People Who Have Charge of Their Own Education?". American Journal of Education (The University of Chicago Press) 94 (2): 182–213. JSTOR1084948. The principal philosopher among the group of parents and others who founded SVS was Daniel Greenberg, a wide-ranging scholar who had previously taught physics and the history of science at Columbia University.